Mouth ulcers are small painful lesions that occur in the roof of the mouth, lips, inner cheeks, and gums. They are generally red or yellow and quite uncomfortable, causing difficulty in drinking and eating.

• Painful sores that may be red, white, or yellow
• Red areas around the ulcers
• Swelling around the lesions
• Pain that worsens with talking, teeth brushing, eating, and drinking
• Fever
• Swollen glands
• Extreme tiredness

The exact cause of mouth is unknown to date. However, certain factors can contribute to sore development. They are as follows:

• Accidental biting of the tongue or cheek
• Minor injury during dental cavity fill-up
• Wearing orthodontic braces
• Using harsh toothbrush
• Allergic response to oral bacteria
• Eating acidic foods and beverages such as pineapples, strawberries, and oranges
• Lack of sleep

• Avoiding foods that trigger or deteriorate symptoms
• Avoiding talking while eating to prevent accidental bites
• Avoiding toothbrushes with stiff bristles
• Maintaining oral hygiene, such as daily mouth cleaning and flossing
• Avoiding mouthwashes with alcohol or sodium lauryl sulfate
• Sleeping enough and taking adequate rest
• Properly brushing the teeth after meals